I can’t believe I didn’t cover the dead end/hanger in my Wired article. In short, they had a hanger in 1976, they had stormtroopers, they could have done this if that was the plan. The same two troopers wearing the wrong helmet copy and pasted a hundred times was just proving that they could to this for the prequels if they wanted to for clones. Cutting the existing troopers out without the help of a bluescreen was a test to see if they needed to depend on bluescreens for the prequels. It’s a bad idea poorly executed only added to test prequel technology, just like most of the other SE changes.